Hoisting bucket



E. E. BROSIUS HoIsTING BUCKET Y Nov. 28, 1933.

Filed May 28, 1931 5 Sheets-Sheet l E. E. BROSIUS HOISTING BUCKET Nov.28, 1933.

Filed May 28, 1931 5 ShetS-Sheet 2 NOV. 28, E' E BROSlUS HOISTING BUCKETFiled May 28, 1931 5 Sheets-Sheet 5 K9 66 1 f f f /7/ 'V67II W70 72 M 66 /0 RTW INVENTORl 5 I fr, @0%444/ Nov. 28, 1933.

E. E. BRoslus ,n 1,936,660

HOISTING BUCKET Filed May 28, 1931 5 Sheets-Sheet 4 640 55 J ,d J0 3/.5( i@ 3/ I' ,'1- l-I I l l /VI ifo O dl@ OI /12-5 u l; -Im I' 3/ i@ 23/(d2 [im @D K @D J5 32 j 5.5

O fig@ E. E. BROSIUS HOISTING BUCKET Nov. 28, 1933.

Filed May 28, 1951 5 Sheets-Sheet 5 INVENTOR Patented Nov, 28, 1933UNITED STATES PATENT oFF1cE Hols'rING BUCKET Edgar E. Brosius,Pittsburgh, Pa.. Application May 2s, 1931. serial No. 540,617 9 claims.(C1. 371s4) This invention relates generally to material handlingapparatus and more particularly to an improved hoisting bucket andlatching mechanism for engaging and disengaging a movable cross headwith a lifting bar to which the sections of the bucket are connected. i

It has heretofore been customary in the artto which the presentinvention relates to construct hoisting buckets of the general typeherein contemplated by utilizing a plurality of specially constructedshapes, and fabricating them under such conditions that the completedbucket is not only unnecessarily heavy, but also comparativelyexpensive. The present invention has for one of its objects theprovision of a bucket which as to all of its principal parts isconstructed either of standard structural or plate members Welded one tothe other to form the completed bucket. In this manner the cost andexpense as well as the weight of the completed bucket are all materiallyreduced.

In the accompanying drawings which illustrate two embodiments of myinvention;

Figure 1 is a side elevation of a bucket with the bucket sections inopen position;

Figure 2 is a similar view showing the bucket sections closed; I

Figure 3 is an end elevation with the bucket sections closed;

Figure 4 is an enlarged horizontal section taken on the line IV-IV ofFigure l, certain parts being omitted for clearness;

Figures 5, 6 and 7 are respectively-a plan, a side elevation, and an endelevation of the movable cross head;

Figures 8 and 9 are respectively a plan and a side elevation of theguide lever; f

Figures 10 and 11 are respectively a plan and a side elevation of thetrip lever;

Figures 12 and 13 are respectively a plan and a side elevation of thelatch;

Figure 14 is a partial side elevation similar to Figures 1 and 2 butshowing a modied cushioning means for the cross head; and

Figure 15 is a perspective view of a bucket constructed in accordancewith the present invention.

Referring more particularly to the accompanying drawings, the bucketcomprises sections 2 and 3 pivoted at their upper edges, as shown inFigure 1, to supporting shafts 4 and 5 respectively. The bucket section2 has arms welded thereto at its sides, each of the arms 6 beingprovided with hubs 7 and bushings 11 rotatably mounted on a lifting rodor shaft 8, which also constitutes the pivotal connection between thebucket sections.

The section 3 has arms- 10 welded thereto at their outer ends, the innerends being offset inwardly, as shown in Figure 4, and having openingsfor the lifting rod 8. The arms 10 are connected by a channel 12 havingupwardly extending flanges 13. An angle 14 is secured to the channel 12Vadjacent each of the arms 10, their vertical flanges 15, as viewed inFigure 1, being cut away vto provide an outwardly extending stop 16. Inthe position shown in Figure 4, each of the stops 16 rests uponcooperating plates 17 secured to the inner sides of the arms 6, theengagement of these parts limiting the opening movement of the bucketsections.

The shaft 5 to which the section 3 is pivoted, is carried by upwardlyextending links 20 braced by a channel 21. The upper ends of the links20 are constructed to provide forks 22, as shown in Figure 3, adapted toreceive sheaves 23. The cross shaft 4 to which the bucket section 2 isconnected is pivotally secured in the lower ends of links 24 pivoted attheir upper ends to a transverse shaft 25 supported by brackets 26secured to the forks 22. l

A cross head, indicated generally by the reference numeral 28, ismovable from the full line to the dot and dash line position indicatedin Figure 1. The cross head is illustrated in detail in Figures 5, 6 and7 and comprises spaced plates 29 and 30 Welded at their end andintermediate portions to spacers 31. The plates are also braced by a bar32 shown in Figures 6 and 7. Welded to the outer surfaces of the plates29 and are horizontally extending bosses 33 which provide bearingsforvsheaves disposed between the spaced plates 29 and 30. Also welded tothe -outer surfaces of the plates 29 and 30 are four verticallyextending tubular housings 35 which receive bumper pins 36. These bumperpins or bolts extend through the housings 35, and a spring 37 is coiledaround each of the bolts 'and presses against the bottom of a housingand against a bolt head 38. The bosses 33 are provided with openings 40for the ends of U-shaped guards 41. Plates 42 extend crosswise betweenlthe plates 29 and 30 acting to space the latter, the plates 42 extendingbelow the side plates at their lower ends to provide ears 43 havingopenings 44 which receive a pin 45, and abutting at their upper endsagainst the intermediate spacers 31. The bar 32 extends diagonallybetween the plates 42 at their intermediate portions and stiffens thesame. 110

A guide lever indicated generally by the reference numeral 48 is pivotedat its upper end to the pin 45 and at its lower end to the shaft 5, thedetails of the guide lever being shown in Figures 8 and 9. The guidelever is formed of two side plates 49 and 50 spaced apart and welded toplates 51 and 52. Bosses 53 are welded to the left hand ends of theplates 49 and 50, and are braced by gussets 54. A trip lever 55 isreceived 'within the space between the side platesl49 and 50 and ispivoted to the guide lever on a pin 55a which extends through an opening56 in the end of the trip lever and through corresponding openings 57tin the guide lever. As shown in Figure 10, the trip lever is formed witha hub portion 58 comprising spaced sides and is provided below theopening 56 with an arcuate slot 59 which receives a roller 60. The hubportion 58 is cut away on the line 61 in order thatl the latch which isabout to be described may contact with the roller received inthe slot59;

In Figures 12 and 13 there is shown a latchindicated generally by thereference numeral 65 which. is received in the space between the sideplates 49 and 50 or" the guide lever, the latch being pivoted on a pin66 which extends through f an opening 67 in the hub portion 68 of thelatch and through corresponding openings 69 in the sideplates 49 and 50.One end of the latch is provided with a notch 70 shaped toiembrace thelifting rod'8, the opposite end of the latch beingv provided with anoffset 71 adapted to receive the roller 60, the offset'71 being providedwith a hardened tip 72; The left hand end 73 of the latch, asviewe'dinFigures l2 and 131, is adapted to fit between the spaced sides 74 ofthe trip lever so that theroller 60 can be received in the offset 71.

Thebucket' is suspended from a crane hook 80 byj ahook block- 81 towhichY is secured one end of eachof two cables 82. Each of the cables 82passes downwardly from the hook block and around a sheave 83 inthe crosshead, and then' passes upwardly around one of the sheaves 23, and: thendownwardly' and is dead-ended to the inrierend- 841of abracket 85secured to the bucket section 3. These brackets, as apparent fromFigure3, are preferably so positioned as tov provide intermediatebearingsfortheshaft 5, thus adding to the rigidity of the structure. A triprope. 86- is secured, as indicated by the reference numeral 87, to oneend ofthe trip lever 55, the rope passing over a= pulley 88suspended'froin a bracket89 secured, to the channel 21. l In theoperation of the bucket, the bucket seotions are lowered until theyassume .the positions indicated in Figurey 1. As the cross head is low-`ered, the pin 45 which connects the guide lever andcross head describesthe arc indicated by the reference letter A. The downward movement' of Ithe guide lever 48 carries with it the Vlatch 65 and: thetrip lever 55.When the cross head reaches the position indicated in full lines inFigure 1, the lifting rod 8 is received in the notch 70'and the latch 65is held in a position to maintain. engagement between the latch andlifting rod, by the roller 60 which is received in the offset 71. Thecables 82 are then raised until the parts assume the position indicatedin Figure 2, the engagement between the latch 65 and the lifting rod 8,causing the bucket sections 2 and 3 to swing upwardly about shafts 4 and5.

As the cross head is raised it comes into contact with' the plates 22and any further lifting of the cable acts to raise the bucket, thesprings 37 cushioning the lifting contact between the cross head andframe. When it is desired to dump the bucket, the trip rope 86 ispulled, thereby swinging the trip lever about its pivotal mounting 55aand moving the roller 60 out of engagement with the latch, thus allowingthe latch to swingy to the position indicated in dot and dash lines inFigure l. The lifting rod 8 is thereby released from the notch 70 andthe bucket sections are free to swing'under the action of gravity, totheir open positions, being limited by the stops 16.

To those skilled in the art it will be apparent that if the bucketsections are permitted to swing freely during their opening movement,the engagement of the stops 16 with the cooperating plates 17 wouldsubject the entire bucket to severe.' and sudden shocks and strains. Inorder to preclude such a condition and to insure a gradual opening ofthe bucket sections, the reaving of the hoisting cables and theirconnections as before described are such as to cause the bucket toclimbV upwardly during the opening movement, the-upward movement tendingto counteract to the desired extent, the opening movement of the bucketsections, thus relieving all of the parts froms objectionable shocks ofthe character re-v ferred to.

In Figure 14 there is shown a modified cushioning means for cushioningthe contact between the cross head and the frame as the cross head isvraised. In this figure parts corresponding to those` used in otherfigures are indicated by the same reference numerals with the letter asuflixed. As shown in this figure, leaf springs 90 pagovided with aspring clip 91 are suspended fromv pins 92 secured to the plates 22. Thecross head is formed with a shoulder 93 which contacts withthe springclip as the cross head is raised, there by cushioning the jar whichwould result if no cushioning Ymeans were interposed between the crosshead and frame.V

In the foregoing description reference has already been rnade to the'welding of certain of the parts. By reference to Figure 15 of thedrawings, however,l the complete structure with respect to its componentparts, andthe manner of assembling the will be more readily understood.From this gure it clearly appears that the bucket section 2`comprisestwo side members 95 in the form of ordinary steel plates cut to thedesired shape. Intermediate these side plates is a bottom plate 96vandan end plate 97, all of the plates being welded one to the other asindicated in the draw-- ings. For further strengthening the parts andeliminating a condition in which all of the welds would be entirely inshear, a tie strap 98 is bent into substantially U shape and positionedto embrace the side plates 96 andthe end plate 97, the

tie strap being welded in position.

In like manner, a second tie strap 99 is sestiifened by the transverselyextending channelV 12 which is a structural member readilywelded intoposition.

The links which extend upwardly from the bucket sections may be formedof suitable bar or plate material, the forks 22 extending therebetweenlikewise comprising plates welded to the links as indicated. The crosshead, the guide lever and the trip lever, as well as the latch, allcomprise sections of plate, easily formed, and readily welded whererequired to complete the assembly. The shafts 4 and 5 are of standardconstruction and may be cut from lengths of standard rounds. The bosses33 are cut from lengths of tubing, and the housings 35 are cut fromlengths of pipe, the cut pieces being welded in position. lIhis type ofstructure obviates the necessity of maintaining in stock a plurality ofspecial shapes and sections, and enables the parts to be fabricated in amachine shop at relatively small expense. It also enables bucketsofdifferent sizes to be constructed from similar parts without thenecessity of any special forming operations. The possibility of weldingand of reinforcing the welded parts also facilitates the production of astrong and durable bucket.

I have illustrated and described a preferred embodiment of my invention.It is to be understood, however, that the invention may be otherwiseembodied or practiced within the scope of the following claims.

I claim:

1. In a hoisting bucket, bucket sections pivotally connected tosupporting shafts and to a lifting rod, a cross head movable toward andaway from the lifting rod, a guide lever pivoted at one end to the crosshead and at the other end to one of said supporting shafts, and alatching mechanism carried by the guide lever for engaging anddisengaging the lifting rod.

2. In a hoisting bucket, bucket sections pivotally connected tosupporting shafts and to a lifting rod, a cross head movable toward andaway from the lifting rod, a guide lever pivoted at one end to the crosshead and at the other end to one of said supporting shafts, a latchingmechanism carried by the guide lever for engaging and disengaging thelifting rod, said latching mechanism comprising a latch pivoted to theguide lever and having a notch for receiving the lifting rod, and a triplever pivoted to the guide lever.

3. In a hoisting bucket, bucket sections pivotally connected tosupporting shafts and to a lifting rod, a cross head movable toward andaway from the lifting rod, a guide lever pivoted at one end to the crosshead and at the other end to one of said supporting shafts, a latchingmechanism carried by the guide lever for engaging and disengaging thelifting rod, said latching mechanism comprising a latch pivoted to theguide lever and having a notch for receiving the lifting rod, a triplever pivoted to the guide lever, and a roller received in an opening inthe trip lever and adapted to contact with the latch.

4. In a hoisting bucket, bucket sections pivotally connected tosupporting shafts and to a lifting rod, a cross head movable toward andaway from the lifting rod, a guide lever pivoted at one end to the crosshead and at the other end to one of said supporting shafts, a latchingmechanism carried by the guide lever for engaging and disengaging thelifting rod, said latching mechanism comprising a latch pivotedintermediate its ends to the guide lever and provided adjacent one endwith a notch for engaging the lifting rod and adjacent the other endwith a groove, a trip lever, and a roller received in an opening in thetrip lever, said roller being arranged to engage the groove in the latchto hold the latch in engagement with the lifting rod.

5. In a hoisting bucket, bucket sections pivotally connected tosupporting shafts and toa lifting rod, a cross head movable toward andaway from the lifting rod, a guide lever pivoted at one end to the crosshead and at the other end to one of said supporting shafts, said guidelever providing a space between its sides for receiving a latchingmechanism for engaging and disengaging the lifting rod, and a latchingmechanism in said space pivoted to said guide lever.

6. In a hoisting bucket, bucket sections pivotally connected tosupporting shafts and Vto a lifting rod, a cross head movable toward andaway from the lifting rod, a guide lever pivoted at one end to the crosshead and at the other end to one of said supporting shafts, said guidelever containing two spaced apart plates providing a space for receivinga latching mechanism for engaging and disengaging the lifting rod, and alatching mechanism in said space pivoted to the guide lever.

7. In a hoisting bucket, bucket sections pivotally connected tosupporting shafts and to a lifting rod, a cross head movable toward andaway from the lifting rod, a guide lever pivoted at one end to the crosshead and at the other end to one of said supporting shafts, said guidelever containing two spaced apart plates providing a space for receivinga latching mechanism for engaging and disengaging the lifting rod, alatching mechanism in said space, said latching mechanism comprising alatch pivoted to the guide lever and having a notch for receiving thelifting rod, and a trip lever` pivoted to the guide lever.

8. In a hoisting bucket, bucket sections pivotally connected tosupporting shafts and to a lifting rod, a cross head movable toward andaway from the lifting rod, a guide. lever pivoted at one end to thecross head and at the other end to one of said supporting shafts, saidguide lever containing two spaced apart plates providing a space forreceiving a latching mechanism for engaging and disengaging the liftingrod, a latching mechanism vin said space, said latching mechanismcomprising a latch and a trip lever, each received in said space andpivoted to the guide lever.

9. In a hoisting bucket, bucket sections pivotally connected tosupporting shafts and to a lifting rod, a cross head movable toward andaway from the lifting rod, a guide lever pivoted at one end to the crosshead and at the other end to one of said supporting shafts, said guidelever containing two spaced apart plates providing a space for receivinga latching mechanism for engaging and disengaging the lifting rod, alatching mechanism in said space, said latching mechanism comprising atrip lever, and a latch pivoted intermediate its ends to the guide leverand provided adjacent one end with a notch for engaging the lifting rodand adjacent the other end with a groove, and a roller received in anopening in the trip lever, said roller being arranged to engage thegroove in the latch, the latch, the trip lever and the roller beingreceived in the space provided by the guide lever and pivoted thereto.

EDGAR E. BROSIUS.

